title: HPLC-APCI-MS for the determination of vitamin K(1) in human plasma: method and clinical application.
abstract: A sensitive HPLC-APCI-MS method for the determination of vitamin K(1) (VK-1) in human plasma was established. Target ions at [M+H](+)m/z 451.5 for VK-1 and [M+H](+)m/z 331.4 for the I.S. (teprenone). Calibration curve was linear over the range of 0.3-1,000 ng/ml. The lower limit of quantification was 0.3 ng/ml. The intra- and inter-batch variability values were less than 8% and 15%, respectively. The C(max) was 210.1+/-86.7 ng/ml while the elimination half-life (t(1/2)) was 8.8+/-1.7h and time to the C(max) was 5.5+/-0.8h after administration of soft capsule containing 10mg VK-1.
authors.affiliation: Department of Pharmaceutical Analysis, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, China. songqinxin@sina.com
authors.forename: Qinxin
authors.initials: Q
authors.lastname: Song
authors.forename: Aidong
authors.initials: A
authors.lastname: Wen
authors.forename: Li
authors.initials: L
authors.lastname: Ding
authors.forename: Li
authors.initials: L
authors.lastname: Dai
authors.forename: Lin
authors.initials: L
authors.lastname: Yang
authors.forename: Xiemin
authors.initials: X
authors.lastname: Qi
mesh_terms: D000284:Administration, Oral; D000704:Analysis of Variance; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004355:Drug Stability; D006801:Humans; D016014:Linear Models; D008297:Male; D013058:Mass Spectrometry / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D010837:Vitamin K 1 / Q000008:administration & dosage / Q000031:analogs & derivatives / Q000097:blood* / Q000493:pharmacokinetics
chemical_list: D010837:Vitamin K 1